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DC Motors

DC Motors
A dc motor can be easily identified by

Commutator
Winding
Size of conductor
Yoke

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DC Motors
The maximum end play of a motor is about

2 mm
10 mm
6 mm
0.4 mm

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DC Motors
When the speed of dc motor increases, its armature current

Remains same
Decreases
Increases
None of the listed here

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DC Motors
At the instant of starting when a D.C. motor is put on supply, it behaves like

A capacitive circuit
A highly resistive circuit
None of these
A low resistance circuit

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DC Motors
No load speed of which of the following motor will be highest?

Cummulative compounded motor
Differentially compounded motor
Series motor
Shunt motor

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DC Motors
The dirction of rotation of a dc series motor can be changed by

Interchanging field terminals
Interchanging supply terminals
None of the listed here
Either of Interchanging field or Interchanging supply

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